An application developer directly uses an API to locate records either by their key or by using an index. An indexed database can be implemented using a persistent B-tree data structure.

For example, Mastodon and Peer Tube users are able to use Activity Pub to allow users to share videos and comment across different servers.

The second Web Payments Working Group Patent Advisory Group (PAG), launched in November 2017, has published a report recommending that W3C continue work on the Web Payments Specifications.

Selectors are patterns that match against elements in a tree, and as such form one of several technologies that can be used to select nodes in an XML document.

Selectors have been optimized for use with HTML and XML, and are designed to be usable in performance-critical code.

Expected topics of discussion include: The World Wide Web Consortium (W3C) is an international community that develops open standards to ensure the long-term growth of the Web.Activity Pub allows software projects both small and large to build social network offerings into their systems.Adding Activity Pub support allows interoperable social networking between applications with entirely different codebases.The Social Web Working Group has published Activity Pub as a W3C Recommendation.

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Activity Pub is a decentralized social networking protocol based upon the Activity Streams 2.0 data format.